X0303 4 2011-06-20 0001423221 Quanex Building Products CORP NX 0001130145 BARGER DONALD G JR 1900 WEST LOOP SOUTH SUITE 1500 HOUSTON TX 77027 1 Common Stock 2011-06-20 4 P 0 37 15.81 A 4226.35 D Common Stock 2011-06-20 4 P 0 363 15.809 A 4589.35 D Common Stock 2011-06-20 4 P 0 500 15.807 A 5089.35 D Common Stock 2011-06-20 4 P 0 100 15.798 A 5189.35 D /s/ Paul B. Cornett, Power of Attorney 2011-06-21